Students take down one smiley face anytime they blurt out. Students can either get 3 blurts per day or week depending on your class - I think I would prefer individual student charts instead of having the whole class on display like this.
Spirit days are a great way to build a community feeling in the classroom! My grade 6 teacher Ms. L always had us all get so into spirit days and it made our class so close. I hope to do the same for my future class too.